In Nc you have to get an inspection on every vehicle every single year never had to do that in any of the previous states I have lived in. When you have a lot of vehicles it is a real pain in the ass.
Cars need inspection once a year, and it's right on the windshield as a reminder.
It's not really a pain when you have the free time you do - you just do it all on the same day.
Might cost you a few hours by the pool and a dozen selfies, but save you unnecessary angst and problems.